cps-ir: Set runtime type information for new objects that require it.

pkg/compiler/lib/src/cps_ir/type_propagation.dart

Index: pkg/compiler/lib/src/cps_ir/type_propagation.dart
diff --git a/pkg/compiler/lib/src/cps_ir/type_propagation.dart b/pkg/compiler/lib/src/cps_ir/type_propagation.dart
index bd723fc1f0a17f132dcec9f080823ff8acec9239..e6ad665c021c54f875de48fd9756061d61a0894b 100644
--- a/pkg/compiler/lib/src/cps_ir/type_propagation.dart
+++ b/pkg/compiler/lib/src/cps_ir/type_propagation.dart
@@ -775,7 +775,7 @@ class _TypePropagationVisitor<T> implements Visitor {
       // Continuations on the other hand are local, and parameters can have
       // some other abstract value than non-constant.
     } else {
-      internalError(node.hint, "Unexpected parent of Parameter");
+      internalError(node.hint, "Unexpected parent of Parameter: ${node.parent}");
     }
   }
 
@@ -852,6 +852,13 @@ class _TypePropagationVisitor<T> implements Visitor {
     // real constants of type [Type].
     setValue(node, nonConst());
   }
+
+  @override
+  visitTypeExpression(TypeExpression node) {
+    // TODO(karlklose): come up with a type marker for JS entities or switch to
+    // real constants of type [Type].
+    setValue(node, nonConst());
+  }
 }
 
 /// Represents the abstract value of a primitive value at some point in the